1. Investigation of the lower punctum parameters: A spectral domain anterior segment optical coherence tomography study

    Investigation of the lower punctum parameters: A spectral domain anterior segment optical coherence tomography study

    Purpose: To evaluate the dimensions of lower punctum in a sample of Iranian normal population using spectral domain anterior segment optical coherence tomography (OCT). Methods: In this cross-sectional study, 102 eyes of 102 healthy volunteers were enrolled. All participants underwent a detailed history and complete ophthalmic examination. Lower punctum metrics were measured using OCT (Spectralis, Heidelberg) with the anterior segment module. External punctal diameter was defined as the largest diameter at the surface of the punctum. Internal punctal diameter was measured at two different depths of 100 μm and 500 μm from the external surface. Measurements were repeated for 30 ...

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